That haunting grandfather clock sound — how 'Stranger Things' inspired a TikTok trend

• Warning: Major spoilers ahead for "Stranger Things" season four, part one.
• The chimes of a grandfather clock featured in "Stranger Things" have become a trending TikTok sound.

Warning: Major spoilers ahead for "Stranger Things" season four, part one.

If you're confused about why so many TikTokers are using a creepy grandfather clock sound in their videos, it's time to catch up on season four of "Stranger Things."

In the series, the haunting bell chimes of an old grandfather clock signal that a person will soon be killed by the villainous Vecna. While the ill-fated characters hear the chimes and see a clock standing in front of them, no one else is aware of its presence.

It was not long before TikTokers began borrowing the sound for their videos in humorous ways. For example, version of the sound started by the user @taqwyd, has inspired more than 54,000 TikToks.

A particularly popular iteration was created by @joflexes, which has received more than 8.4 million views.

In the TikTok, which he described as "POV: i hear that mf clock," the user rushes to put in his ear pods to listen to Kate Bush's "Running Up That Hill" after hearing the foreboding clock chimes. "Vecna ain't catchin me lackin," he wrote in the caption to his post.

The TikTok references how the show's character, Max, narrowly escapes Vecna in the show after listening to her favorite song — the hit tune by Bush.

In another TikTok by @duhitstcon, which has received more than 2.6 million views, Tyler Constandars showed his 791,000 followers a grandfather clock in the middle of a hallway.

"This is the second time seeing this random clock... if it's just the gods telling me I'm wasting my time w/ my life I GET IT," he wrote in the text overlay.

Many users left comments indicating they were in on the joke, saying that they did not see a clock in the clip. "What clock? I just see a hallway am i the only one?" a user wrote.

Such comments only further confused those who haven't watched "Stranger Things." "Why are people saying they don't see a clock, it's literally in the middle of the hallway ur scaring me," wrote one user.

Meanwhile, TikToker @idontlikesharks shared in a video that they may not be able to escape Vecna by listening to their favorite song because of Spotify streaming ads.

"POV: Vecna attacks you but you don't have Spotify premium," the read the text in the video, which has received 2.2 million views.